I didn't vote, as I really can't choose one. Kurt Tomberlin will slur to become Kurtomberlin. Holt Tomberlin will become Holtomberlin. I'm not keen on Tomberlin as a fn, as it just seems like a bit much. HoltButler is ok, but doesn't flow that well... So, I'd recommend switching it up. However, these names are meaningful to you... so... I don't know. Go with your heart?

INTJ Anthropologist Living in the centre of China, married to a Persian, and just enjoying a completely unpredictable life